Portable burglar-alarm.



W. CROWLEY. PORTABLE BURGLAR ALARM.

APPLICATION FILED 12 111.14, 1911.

1,009,285. I Patented Nov.21, 1911.

- /6' %%W BY v ATTORNEYS Specification of Letters Patent. Application m February, 1911; Sci-19.1110. 608,818.

To all whomit may concern:

Be it known that I, WILLIAM CROWLEY, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented anew and useful Portable Burglar-Alarm, of which the following is a specification.

This invention relates to burglar alarm devices and more particularly to a portable alarm .and has for an object to provide a mechanism which may readily be ,attached to a door, window or other movable part whereby any movement of such part will cause an alarm to be given.

,It has for a further object to provide a simple and effective device for the purpose intended and which takes up little space, is compact, and may be carried. from place to place by travelers for use in hotels, or other dwellings as an additional safe guard over the common locking device. p s

\It further consists of other novel features of construction all as will be hereinafter fully set forth.

For the purpose of illustrating my invention, I have shownin the accompanying drawings one form thereof which is at present preferred by me, since the same has been found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited 'to the precise arrangement and organization oithese instrumentalities as herein shown and described.

Figure 1 represents a perspective of a device embodying my invention in operative position. Fig. 2 represents a plan of the operating mechanism in its box. Fig. 3 represents a diagrammatic view of the electrical circuit. Figs. 4, 5 and 6 represent 'respectively, different views of the circuit clos-' ing device.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings :1 designates a suitable box preferably of convenient size for transportation in an ordinary traveling case or the like, the same preferably having mounted therein a base 2, to which are secured the battery 3 and alarm buzzer 4, of any well known type. 1

5 designates a lamp here shown as secured to the cover of the box and connected in the circuit with the said batter and,

Patented; N01. 21, 1911;

;buzzer,.whereby both the buzzer 4 an light ,5 are operated simultaneously, as will .be

apparent.

In the present instanceI have provided 'a novel type of circuit closure 6, consisting in the present instance of the members 7 and 8, each preferably provided with pointed ends '9, so that the devicemay be pressed into a suitable material. These members 7 and 8, in the present instance, are preferably mounted on the pin 10 with suitable insulation 11 between one of the members and the said pin 10 so that the same are electrically disconnected, while a spring 12 is secured to the member 8 and preferably passes through the pin 10 and bears against the lug 13 so that should the members move relative to each other, the spring 12..returns them to normal position. It will be noted that a slot 151 is formed in the washer 15 on the end of this pin 10 the purpose of which is to form a bearing for the spring 12. 16 designates a. cont-act pin secured to one of the members of the closure 6 and projecting a sufficient distance to be in the path'of movement of the opposite member whereby when the device is in operative posit-ion, contact will be closed between the pin 16 and the opposite member, as will be apparent. As the'spring 12 normally tends to hold this pin 16 a ainst its adjacent member. I have preferably provided a strip ofinsulation 17 slidingly mounted on' the member 7 adjacent the pin 16 and adapted in certain positions to hold the pin 16 out of contact with the member 7. However when it is desired to bring the device into operative position this strip 17 is moved to one side, thus allowing the pin 16 to rest directly against the member 7 and close the contact for operation of the device when the spring 12 pulls the parts together. The strip 17 is here shown as secured by pins 18 to a second strip 19 on the opposite side of the member 7 from the member 17 the said pins passing through a suitable slot 20 in the member 7. A circuit for operating the device consists of the battery 3 connected at one side to the member 8 through the pin 16 to the member 7, thence to one terminal ofthe alarm buzzer 4. and from the other terminal to a switch 21 and thence back to the battery 3.

In the operation of the device the closure is opened and the pointed ends 9 pressed into the wood work'- around a door or window, one of the points being placed in the moving part while the other is in the fixed adjoinmg part so that any movement of the door or window as the case may be, causesthe closure to drop out whereupon the spring 12 returns the members to normal position and brin s the pin 16 into contact with the member it of course being understood that the insulatin strip 17 is moved to operative position to a low direct cont-act.

It will now be apparent that I haye devised a complete unitary structure, well adapted for the purpose intended and operating sufliciently as an alarm device and more particularly one which may be readily transportedfrom place to place and particularly adapted for travelers use. f

It is well known that in small hotels and like places it is frequently found 'b travelers that there are no locks on the oor or any means to secure the windows, whereupon this device; may readily come into use and serve not only as an alarm device for givingwarmng of the opening of the door or window, but also serve to turn on a light by whichthe intruder or trespasser may be seen. 7

It will be apparent that a number of circuit closers may be connected intoithe alarm circuit if desired and the device thereby becomeoperative to give a warning from several points. As shown in Fig. 1, opening of either the window or door will cause the alarm to be operated.

It will now be apparent that I have devised a complete unitary structure well adapted one p1ace.to another and serve as an effec:

tive alarm device.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

In a device of the character stated, a circuit closer consisting of a plurality of members permanently and movably connected together and insulated from each other, a circuit includingsaid members, a contact on one of said members adapted for engagement with'the other member to close said circuit, means to shift one member relative to the other whereby said circuit is closed, and means on each member for positively en-. gaging one member with a fixed part and 'the other with .a movable part, with the members spanning the joint therebetween, whereby relative movement between the fixed and movable parts will cause the disconnection of one of said members which will close said circuit.

\ WILLIAM CROWLEY.

Witnesses:

- ROBERT M. BARR,

C. D. MoVAY. 

